<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/vue.js"></script>
</head>
<body>
<div id="app">
    {{ msg }}
</div>

<script>

    new Vue({
        el:"#app",
        data:{
            msg:"hello vue"
        }
    })

</script>

</body>
</html>